I have a 72 TR6 OD in my 66 TR4A which allows
overdrive in 2nd gear. I have found that the OD in
2nd is very usefull when I need to accelerate quickly
(I am draging someone who is look down at my 4A) and
need to fill that gap between 2nd and 3rd. Having
done that though I need to disingage the 2nd OD when
shifting to 3rd (or I am like in 4th) a nifty trick.
If this sounds like a ridiculous risk of a delicate
OD, then perhaps you are better off without OD in 2nd.
David G. Whitelaw (slasher_dw@yahoo.com)
66 TR4-A IRS.
--- MPRICE@KeystoneSystems.com wrote:
>
> Along these lines.....I have an A type OD that came
> out of a 4A that I am
> putting in my 250, but it doesn't have the reverse
> light switch. I have a
> switch that I can put in, and the location is the
> raised boss that is cast
> into the cover plate, but....
> What is the drill and tap size that I'll need to use
> to install the switch?
> I'm sure someone out there has done this before. Any
> help is appreciated.
> TIA
> Mark
>
> -----Original Message-----
> From: Jim Altman [mailto:jaltman@altlaw.com]
> Sent: Monday, December 13, 1999 9:25 AM
> To: 'Davies William-qswi646'; 'List, Triumph'
> Subject: RE: Overdrive on 2nd Gear
>
>
>
> My A-type works in 2d with no problem. I think the
> only issue is the switch
> in the top cover to allow it actuate. There are
> plugs to drill out to put a
> switch in. Now on the other hand I really haven't
> found it real useful in
> 2d.
>
> This A-type is in a 6.
>
>
>
>
> Jim Altman jaltman@altlaw.com Illigitimi non
> Carborundum
> http://www.altlaw.com/metro/jaltman.html 69-TR6
> 80-TR8 W4UCK
>
> -----Original Message-----
> From: owner-triumphs@autox.team.net
> [mailto:owner-triumphs@autox.team.net]On Behalf Of
> Davies
> William-qswi646
> Sent: Monday, December 13, 1999 8:56 AM
> To: 'List, Triumph'
> Subject: Overdrive on 2nd Gear
>
>
>
> Listers,
> I am currently involved in building a lightweight
> overdrive gearbox
> based on the early Herald/Standard 10 all-alloy
> casing. The 948 gearset has
> a wide gap between 2nd and 3rd gear, but in other
> respects is ideal,
> allowing us to fit a higher ratio final drive
> without losing flexibility
> lower down. Is there any way we can use the
> overdrive (D-type) on 2nd gear?
> I'm aware that Overdrive pressure is dependant upon
> the gear speed, but I
> remember some of the earlier TR's had A-type
> overdrives which operated on
> 2nd. I also knew a guy years back who had a Vitesse
> 6 with the switching
> modified to work on 2nd, but I don't know how
> succesful it was. Our other
> concern is whether the overdrive would handle the
> torque produced in 2nd
> gear.
> The engine used is an SAH tuned 1147cc unit with a
> single weber
> (type?). The vehicle is a 1964 Bond Equipe 2+2,
> weighing around 13cwt.
> Any advice will be appreciated,
> Cheers,
> Bill.
>
>
---------------------------------------------------------
> This Message sent by:
> ^================^
> / \ William Davies
> / \ Total Triumph Enthusiast
> __ __________________ __
> / \ ______ ______ / \ 1959 Herald 948 Coupi
> Y128
> \__/ \ || / \__/ 1959 Herald 948 Coupi
> | A \____||____/ A | 1959 Herald 948 Saloon
> | = H H = | 1960 Herald 948 Saloon
> Export
> =====U==============U===== 1961 Herald 'S'
> \________________________/ 1964 Herald 1200 Saloon
> | | | | 1970 Spitfire MkIII
> |_| |_| 1973 Spitfire MkIV
> 1959 Standard Atlas
> Pickup
>
|